What Sipartech does

Sipartech is a privately held French neutral dark fiber infrastructure operator founded in 2008 by Julien Santina, headquartered in Paris. The company owns and operates a 100% proprietary fiber optic network spanning 34,000+ km across 10 European countries (France, Spain, Italy, Germany, Switzerland, Belgium, Netherlands, United Kingdom, Ireland, and Monaco), connecting 130+ major datacenters and serving more than 600 enterprise, telecom operator, hyperscale cloud, and financial institution customers. The backbone is built on G.652.D single-mode fiber with Dense Wavelength Division Multiplexing (DWDM) technology, supporting optical transmission up to 400 Gbps per wavelength, with photonic restoration capable of 50 ms failover on protected paths and real-time fiber supervision developed with dBeeSet Technology.

The product portfolio is layered on top of the dark fiber base. Sipartech sells Dark Fiber (exclusive unlit fiber pairs on metropolitan and long-haul routes via Indefeasible Rights of Use contracts from 5 years), Wavelengths/Lambda Active (dedicated DWDM point-to-point circuits at 10–400 Gbps), Spectrum (DWDM spectrum channels starting at 2+ Tbps for customer-owned transponders), Ethernet Private Line and Ethernet Collect (carrier Ethernet at 1–400 Gbps, MEF 6.1 compliant), IP Transit and Internet Access (up to 400 Gb/s with anti-DDoS), Cloud Connect (single-Ethernet interconnection to AWS, Google, Azure), and Colocation in shared or dedicated racks across major European datacenters. Complementary services include 24/7 Customer Service Center support, bespoke transmission architecture design, and low-level optical encryption. Technology partners include Ciena (network resilience and BluePlanet orchestration), Cisco (validated 400G transmission over 1,337 km at OFC 2023), FiberSense (predictive monitoring), and Megaport (cloud interconnection across seven European cities).

Sipartech's business model is recurring-revenue heavy, anchored by long-term IRU and rental contracts (typically 3–15 years) with enterprise and carrier buyers on a quote-based, custom-pricing model. The go-to-market is direct enterprise field sales supplemented by major industry events (ITW, Capacity Europe, Submarine Networks EMEA, Datacloud Global Congress), partnerships with technology vendors, and a self-service customer portal (MySipartech). Sipartech is ISO 27001 certified since May 2019 and reports 140+ to 190+ employees (depending on source language) with an average tenure of approximately four years. Capital structure includes successive private equity rounds from NJJ Capital (2010), NJJ Capital and CICLAD (2012), Summit Partners (2016, replacing earlier investors while founders retained majority ownership), Blackstone (October 2019), and a €180 million syndicated loan (June 2021) used to accelerate European long-haul buildout. The company maintains active expansion through 2024–2025, including new long-haul routes (Barcelona–Madrid, Genoa–Milan, Medloop subsea integration), a fourth London POP at Equinix LD8, and selection as a connectivity partner for Europe's largest AI campus in May 2025.

Name

Sipartech

Legal name

SIPARTECH

Website

https://sipartech.com

Company type

Private

Founded year

2008

Operating status

Operating

Headcount range

51–100 employees

Short description

Sipartech is a privately held French neutral dark fiber infrastructure operator offering dedicated fiber, optical transmission, Ethernet, IP transit, and cloud connectivity services to 600+ enterprise, telecom operator, cloud provider, and financial institution customers across 10 European countries.

Ownership category

akta.pro rank

Product category

Telecom Infrastructure Services

akta.pro primary industry

Wholesale Wavelength, Spectrum & Dark Fiber Providers (IRU/Leases) (HDAIALAI)

akta.pro secondary industry

Backbone & Long-Haul Transport (IP/MPLS, Optical/Wavelength) (HDABALAH)

Keywords

• Dark fiber services
• Fiber optic network
• Optical transmission services
• Wavelength services
• Ethernet connectivity

Headquarters

HQ city

Paris

HQ country

France

HQ region

Europe

Offices12 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Infrastructure, Supply Chain, Technology or R&D, Personnel, Operations, Marketing or Sales

Revenue model

1. Dark Fiber Leasing: Leasing of exclusive dark fiber pairs on metropolitan and long-haul networks, including route diversity and custom routes. Revenue generated through long-term contracts (IRU from 5 years, rental 3-15 years, or event-based).
2. Optical Transmission Services: Wavelength (Lambda Active) and Spectrum services using DWDM technology. Provides dedicated optical channels with guaranteed bandwidth from 10 Gbps to 400 Gbps (wavelengths) or spectrum channels enabling 2+ Tbps (Spectrum).
3. Ethernet Services: Carrier Ethernet services including point-to-point and multipoint connectivity from 1 Gbps to 100 Gbps (Ethernet Private Line) and wholesale Ethernet collection services for telecom operators (Ethernet Collect).
4. IP Transit and Internet Access: IP transit services connecting customer equipment to the internet with speeds up to 400 Gb/s, symmetric guaranteed bandwidth from 1 Mbps to 100 Gbps, BGP4 route optimization, and optional DDoS protection.
5. Cloud Connect: Interconnection services to major global cloud providers (AWS, Google, Azure) through secure and redundant infrastructure, enabling customers to connect to multiple clouds via single Ethernet interconnection.
6. Colocation Services: Shared or dedicated rack rental in shared spaces across major European cities, leveraging recognized datacenters (Equinix, Telehouse, Interxion) with 24/7 autonomous access and N+2 or 2N+1 security.
7. Professional Services: Custom deployment studies, transmission architecture design, feasibility studies, equipment selection assistance, installation and configuration, team training, and low-level optical encryption services.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Sipartech is a neutral fiber infrastructure operator that deploys and operates a 100%-owned fiber optic network across 10 European countries, selling dedicated dark fiber, DWDM-based optical transmission services (wavelengths and spectrum), Carrier Ethernet, IP Transit, Internet Access, Cloud Connect, and Colocation to telecom operators, cloud providers, financial institutions, and large enterprises. Its offerings are delivered across a 34,000+ km backbone with 130+ connected datacenters, supported by 24/7 customer service and professional transmission architecture services.

Product overview

Sipartech is a neutral European dark fiber infrastructure operator offering a portfolio of high-connectivity network services. Its core offering is Dark Fiber — dedicated, unlit optical fiber on a 100%-owned network across metropolitan loops and a 34,000+ km long-haul backbone spanning France and 9 other European countries. Built on this infrastructure, Sipartech layers optical transmission services: Wavelengths (Lambda Actif) provides dedicated multi-protocol DWDM circuits at 10–400 Gbps with restoration and photonic protection; Spectrum offers DWDM spectrum channels delivering 2+ Tbps capacity for customers who manage their own transponders. Ethernet Private Line and Ethernet Collect provide carrier Ethernet connectivity from 1 Gbps to 400 Gbps (MEF 6.1 compliant) for site-to-site and wholesale applications. IP Transit and Internet Access services connect customer equipment to the Internet at up to 400 Gb/s with anti-DDoS options. Cloud Connect enables single-Ethernet interconnection to major cloud providers (Amazon, Google, Azure). Colocation (rack rental) is offered across major European datacenters, all natively connected via Sipartech's fiber. Supporting services include 24/7 Customer Service Center (CSC), bespoke transmission architecture design, feasibility studies, equipment installation, training, and low-level optical encryption. The company holds ISO 27001 certification (since May 2019) and operates with 140–190 employees serving more than 600 customers worldwide, connecting 130+ major datacenters with 30% average annual growth since 2010.

Differentiator

Problem solved

Functional benefit

Products and services

• Dark Fiber Exclusive use of unlit optical fiber pairs on metropolitan and long-haul private networks, including custom physical routes. Customers deploy and operate their own transmission equipment with full control over bandwidth, protocols, and speed. Includes optional real-time fiber supervision via dBeeSet Technology. Sold via IRU contracts from 5 years, rentals 3-15 years, or event-based leases.
• Wavelengths (Lambda Actif) Multi-protocol dedicated wavelength services (point-to-point circuits) using DWDM technology across metropolitan and long-haul networks at 10 Gbps to 400 Gbps, with automatic restoration and optional photonic protection (50ms failover). Managed via Ciena's BluePlanet/NCP platform and targeted at telecom operators, hyperscalers, and enterprises requiring dedicated optical capacity.
• Spectrum DWDM spectrum channels providing bandwidth starting from 2 Tbps, allowing enterprises and operators to deploy their own DCI equipment and transponders without maintenance costs, while Sipartech manages the underlying fiber and amplification infrastructure. Optional photonic protection with 50ms switching is available on certain paths.
• Ethernet Private Line Carrier Ethernet service connecting sites or datacenters point-to-point or multipoint at 1 Gbps to 400 Gbps, supporting native Jumbo Frames, MEF 6.1 compliance, and native bandwidth transport. Enables cloud access via Sipartech's network for direct connections to public clouds without local racks.
• Ethernet Collect Wholesale Ethernet/IP collection service for telecom operators and integrators, delivering 1-100 Gbps Ethernet ports in fiber optic single-mode across France and Europe via NNI ports at major datacenters (TH2, SFR Netcenter Courbevoie, Interxion 2, Equinix PA3, etc.), with QinQ support and eligibility tools for mass ordering.
• IP Transit IP transit service connecting customer equipment in buildings or datacenters to the Internet at up to 400 Gb/s with native n×100 Gb/s bandwidth, including CPE provisioning, maintenance, supervision, and two levels of security. 70+ POPs and datacenters eligible in France, Europe, and the USA.
• Internet Access Symmetric internet access service at 1 Mbps to 100 Gbps via Sipartech's optical fiber, with BGP4 route optimization, optional ARBOR-based anti-DDoS protection, 86 owned points of presence, and 8 peering points. Supports full BGP view or default route and upgradeable commit within 24 hours.
• Cloud Connect Secure, redundant interconnection service enabling customers to connect to major global cloud providers (Amazon, Google, Azure, etc.) at lower cost via single Ethernet interconnection. Available across all Sipartech POP sites with mono or dual interconnection options and rapid deployment.
• Colocation (Rack Rental) Shared or dedicated rack space rental in shared environments across major European cities, leveraging facilities at Equinix, Telehouse, Interxion, and other recognized providers, all connected via Sipartech's proprietary fiber. Offers 600×1000 or 600×1200 racks from 1 KVA to 16 KVA, managed PDUs, 24/7 autonomous access, N+2/2N+1 redundancy, and Tier III/IV environments.
• Accompaniment Services (Professional Services) Bespoke accompaniment services including transmission architecture design, feasibility studies, transmission equipment selection support, equipment installation and initial configuration, team training and competency transfer, and low-level optical encryption.
• RPFD (Private Dedicated Fiber Network) Private dedicated fiber network offering utilizing Sipartech's 34,000+ km European backbone, serving 30+ cities in Europe with 80 edge datacenters, providing DWDM channel illumination, fiber access across the backbone, and transmission reinforcement via ILA at edge datacenters.

Quantifiable outcome

• 30% average annual growth rate since 2010
• +6 more outcomes

Named customers14 records

Segments5 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

Seven partnerships are on record, tiered flagship, core and strategic.

• MGX, Bpifrance, Mistral AI, NVIDIA (AI Campus Consortium)flagshipStrategic or Co-development Partner · 1 May 2025In May 2025, Sipartech was selected as a partner in the ecosystem of Europe's largest AI campus in France. The campus, led by a joint venture with Bpifrance, MGX, Mistral AI, and NVIDIA, requires approximately €8.5 billion investment and represents a major strategic opportunity for Sipartech's connectivity services.
• MegaportcoreTechnology or Integration · 1 January 2025Sipartech extended its partnership with Megaport in January 2025, offering customers cloud access at Paris, Marseille, Amsterdam, London, Frankfurt, Milan, and Madrid locations.
• FiberSensecoreTechnology or Integration · 1 October 2024Sipartech partnered with FiberSense in October 2024 to implement groundbreaking asset protection across European networks. FiberSense's technology enables Sipartech to anticipate, detect, and geolocate incidents on its fiber network, enhancing infrastructure security.
• CienacoreTechnology or Integration · 1 September 2024In September 2024, Sipartech enhanced its European network resilience and quality by implementing Ciena technology. This partnership strengthens Sipartech's ability to deliver high-capacity optical transmission services.
• Zain Omantel International (ZOI)strategicStrategic or Co-development Partner · 1 July 2023Zain Omantel International (ZOI) and Sipartech expanded their strategic partnership in July 2023 to a higher level. The partnership provides enhanced connectivity services connecting Middle East and European markets.
• CiscocoreTechnology or Integration · 1 March 2023In March 2023, Sipartech and Cisco successfully completed a 400G transmission test over 1,337 km, demonstrating advanced optical transmission capabilities. The test was featured at OFC 2023.
• TelxiuscoreTechnology or Integration · 1 October 2021In October 2021, Sipartech became the first French operator connected to the Telxius Telecom Hub in Derio, Spain. This connection enables Sipartech to offer enhanced international connectivity services.

Scale indicators14 records

Recent moves8 records

Expansion highlights6 records

Broad incumbents

• Equinix: Global colocation and interconnection platform. Equinix is both a major customer and a facility partner for Sipartech; comparable as a large incumbent in the European interconnect ecosystem.
• Lumen Technologies: Large incumbent carrier with significant European wholesale and enterprise fiber assets. Competes broadly in wavelengths, IP transit, and managed network services with European operators including Sipartech.
• GTT Communications: Global managed network and wholesale services provider offering wavelengths, Ethernet, and IP transit. Overlaps with Sipartech in the wholesale carrier and enterprise connectivity space in Europe.
• Interxion (Digital Realty): European datacenter and interconnection operator (now part of Digital Realty). Functions as both a key colocation counterparty and an overlapping customer/competitor in cloud connectivity services.

Direct peers

• Zayo Group: Large independent fiber operator in North America and Europe offering dark fiber, wavelengths, and managed services. Comparable wholesale model and customer profile to Sipartech, with a much larger North American presence.
• Arelion (formerly Telia Carrier): Tier-1 wholesale carrier with extensive European and trans-Atlantic fiber footprint offering wavelengths, IP transit, and Ethernet. Direct competitor for carrier, cloud, and content customers in Europe.
• RETN: Independent European-focused IP and transport network with owned fiber and wavelengths across the continent. Direct peer in the wholesale carrier market, particularly for IP transit and wavelengths.
• Colt Technology Services: Global B2B connectivity provider with owned European fiber, wavelength, and Ethernet services. Direct competitor in the enterprise and carrier wholesale segments served by Sipartech.
• euNetworks: Pan-European wholesale fiber operator offering dark fiber, wavelengths, and colocation across 17+ cities. Closest direct comparable to Sipartech in scale, customer mix, and product portfolio, though with somewhat broader geographic spread.

Regional players

• Telxius: Telefonica's infrastructure unit operating subsea cables and terrestrial backhaul across southern Europe and Latin America. Strategic partner of Sipartech (Derio hub, 2021) and a comparable subsea-adjacent fiber operator in Iberian/Mediterranean markets.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/sipartech

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Subsidiaries1 record

Funding overview

Funding rounds1 record

Investors1 record

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sipartech